Probability

25

Contents:

A Introduction to probability [10.1]

B Estimating probability [10.2, 10.6]

C Probabilities from two-way tables

[10.2, 10.6]

D Expectation [10.3]

E Representing combined events

[10.4, 10.6]

F Theoretical probability [10.4, 10.6]

G Compound events [10.4]

H Using tree diagrams [10.5]

I Sampling with and without

replacement [10.5]

J Mutually exclusive and non-mutually

exclusive events [10.5]

K Miscellaneous probability questions

[10.4 - 10.6]

Opening problem

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Jenaro and Marisa are playing a game at the local fair.

They are given a bag containing an equal number of red

balls and blue balls, and must each draw one ball from the

bag at the same time. Before doing so, they must try to

guess whether the balls they select will be the same colour

or different colours.

Jenaro thinks it is more than likely that the balls will be

the same colour. Marisa thinks it is more likely that the

balls will be different colours. Their friend Pia thinks that

both outcomes are equally likely.

Who is correct?

IGCSE01

cyan magenta yellow black

(^05255075950525507595)
100 100
(^05255075950525507595)
100 100
Y:\HAESE\IGCSE01\IG01_25\505IGCSE01_25.CDR Monday, 27 October 2008 2:29:27 PM PETER